Gravitational waves and magnetic monopoles during inflation with Weitzenböck torsion

JESÚS MARTÍN ROMERO; MAURICIO BELLINI; JOSE EDGAR MADRIZ AGUILAR

PHYSICS OF THE DARK UNIVERSE

ELSEVIER

Lugar: Amsterdam; Año: 2016 vol. 13 p. 121 - 125

We study the variational principle on a Hilbert-Einstein action in an extendedgeometry with torsion taking into account non-trivial boundary conditions. We obtain an effective energy-momentum tensor that has its source in the torsion, whichrepresents the matter geometrically induced. We explore about the existence of magnetic monopoles and gravitational wavesin this torsional geometry. We conclude that the boundary terms can be identified as possiblesources for the cosmological constant and torsion as the source of magnetic monopoles. We examine an example in which gravitational wavesare produced during a de Sitter inflationary expansion of the universe.